Currently I am working with Data Gridview and Datetime picker in VB.Net
And dont know how to pass the value from gridview to date time picker. please help
Below is Date Colume of gridview
This error occured after debug
I tried some code...
Student_Admission.DateTimePicker2.Value = CDate(DataGridView1.CurrentRow.Cells(1).Value)
in the first code you are converting to date then ToString. The value of DTP obviously cant hold that. To adjust the format you need to add a .Format property
The second code you supplied should work assuming there is a value that can be a date in cell(1) of the current row
Edit. ok, so you're not actually calling .ToString("mm/dd//yyyy") you are actually expecting the value to format as such? that's not going to work either.
Related
I am using VB.Net 2008.
I have two DateTimePicker. The first has a default value 8/24/2017 1:35 PM (as it was created Aug. 24. The second one has the default value of what is the current date and time. I haven't set their default values in Properties.
It is just weird for me that they have different default values. Anyway, my desired value is the current date and time.
I have also experienced confusion on my previous project regarding DateTimePicker where it has always default time 1:32 PM where time should be disregarded. The format is "Short" and the default value is the current date w/o time.
Can anyone explain why it happens?
Thank you in advance.
In my experience, a DateTimePicker contains the current date and time in its Value property unless you set it otherwise. Why that should not be happening for one of your controls, I don't know. In that case though, I'd suggest simply deleting that control and adding a new one. Hopefully that will behave as expected.
There's no such thing as a DateTimePicker that "disregards" time. The Value property of a DateTimePicker is type DateTime and a DateTime ALWAYS has both a date component and a time component. You can set the Format and optionally CustomFormat properties to show only the date, only the time or only some part thereof but that makes exactly zero difference to what's stored in the Value property.
Just like for any other DateTime value, if you want the Value of a DateTimePicker to represent just a date then you should zero the time. If you want to use the current date without a time then use DateTime.Today, where DateTime.Now would get you the current time as well as the current date. If you want to zero the time of any DateTime value, including the Value of a DateTimePicker, then you get its Date property. Note that that does not affect the original value, but creates a new DateTime value with the same date and the time zeroed, e.g.
Dim selectedDate = myDateTimePicker.Value.Date
Note that DateTime.Today simply returns DateTime.Now.Date.
I am currently using Microsoft Visual Studio Express 2013 for Windows desktop with an SQL back-end. I am trying to run an SQL query that will have the date time in format "yyyy-mm-dd." My problem is I need to see all entries from that date. Currently my date time picker keeps giving me a time with my selection. I need to remove the time portion. I tried a couple of solutions from the web but when I try and display the date time picker in a message box to see what the value is it says false. I am not sure how to change the output value in the custom field to remove this. Here is my code.
This is in on my load event:
'date time picker set up
DTPPromiseDate.Format = DateTimePickerFormat.Custom
DTPPromiseDate.CustomFormat = "yyyy-MM-dd"
Then in a button click event, is a message box to display what was selected in the date time picker. I want to get my message box working correctly before I try and run SQL queries with it.
MsgBox(DTPPromiseDate.Value)
-------------------------UPDATE-----------------
This code appeared as I wanted it to but I am still trying to work it into my query.
DTPPromiseDate.Value.ToString("yyyy-MM-dd")
Apply the formatting string that you used in the picker's custom format to the message box text as well.
I am trying to fill a textbox value with the current date and I do not want the user to be able to change the date. I want to use a textbox and not a datepicker. I would like the form to load with today's date already loaded in the textbox, which I will then use in my insert query.
I want the date format of yyyy-MM-dd to be in the textbox memberregisterationdate.text. I am not sure where on my form I should put the code either.
Really stuck on this and I can't seem to find it anywhere
Thanks in advance
You have to make it Enabled = False to disable it. You can load it in Form_Load:
memberregisterationdate.Text = Date.Today.ToString("yyyy-MM-dd")
I'm using a DataGridView that gets its data from table in Microsoft Access, one of the fields is a Short Time type record (e.g 16:00) but when the DataGridView is loaded it shows the record as "16:00 12/31/1899" and never shows only the ShortTime.
Thanks for helping.
The datagridview doesn't look at the original type to do its formatting. If the system type was a timespan instead of a datetime, a default time formatting was used. Perhaps you can influence the binding?
In any rate, you can always override any default formatting by using the CellFormatting event of the datagridview (see link for example)
edit oops, forgot to mention the easiest way: set the format of the defaultcellstyle of a column (can be done in designer):
YourDataGridView.Columns["NameOfTimecolumn"].DefaultCellStyle.Format = "HH:mm";
I have a datepicker in a vb.net clickonce application. I need to make sure that in order to use the application that selecting a valid date is required. Ideally, I would be able to set the value of the datepicker to null and then programatically create Try Catch logic based on datepicker1.value still being null. Unfortunately, it will not allow me to assign a null or blank value to the datepicker. I cannot create my logic based on any real values of the datepicker because who's to say the value picked is not valid. I've tried setting the value to some outrageous date that no one would pick for the application like 1/1/1970, but then the datepicker opens up at 1/1/1970 and drops that date in as soon as it gains focus. I need a way to validate whether or not someone has selected a date, but am stuck and can't find any real help online. I am not looking to set the customformat = "", so please do not respond with that solution. I need the actual value to be blank or something I can run validation against to know that the user has in fact selected a date.
Set the ShowCheckBox property to true. That will make the control look like this...
When the user selects a date, it will check the checkbox. Then when you need the value...
If datePicker.Checked Then
'user has selected a value
Else
'user has NOT selected a value
End If
Can you use the ValueChanged event to set a flag to tell you they've clicked on a date?
UPDATE
You could also use the OnClick method to set a flag to verify the user actually clicked on the DateTimePicker.